Alfa Network Optigo F45CC User manual
31671288EN-02
2
Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
Index
1 Important information..............................................................................................................4
1.1 Disclaimer...................................................................................................................................4
1.2 Safety precautions......................................................................................................................4
1.3 Intended use ..............................................................................................................................4
..............................................................................................5
1.5 Warning symbols........................................................................................................................5
1.6 Health and hygiene ....................................................................................................................6
1.7 Checks at delivery .....................................................................................................................6
1.8 Return of unused heat exchangers ............................................................................................6
1.9 Guarantee ..................................................................................................................................6
1.10 Disposal .....................................................................................................................................6
2 Product description .................................................................................................................7
2.1 General information and application...........................................................................................7
...............................................................................................................7
2.3 Options.......................................................................................................................................7
2.4 Code description ........................................................................................................................8
3 Product labels...........................................................................................................................8
4 Transport and storage ...........................................................................................................10
5 Unpacking and lifting.............................................................................................................10
6 Installation ..............................................................................................................................12
6.1 Mounting dimensions ..............................................................................................................12
6.2 Mounting bracket......................................................................................................................13
6.3 Location and technical spaces .................................................................................................13
6.4 Refrigerant connections ...........................................................................................................14
6.5 Using secondary refrigerants ...................................................................................................14
6.6 Pressure test ............................................................................................................................15
6.7 Drain line .................................................................................................................................15
6.8 Hot-gas connections.................................................................................................................16
6.9 Electrical connections ..............................................................................................................16
6.10 Power failure ............................................................................................................................16
6.11 Fan motor connections.............................................................................................................17
6.12 Defrost......................................................................................................................................20
6.13 Electric defrost connections ....................................................................................................20
6.14 Fan shroud heater....................................................................................................................22
6.15 Hot-gas defrost ........................................................................................................................22
7 Maintenance............................................................................................................................23
7.1 Shut down periods....................................................................................................................23
7.2 Moisture in the refrigeration system .........................................................................................23
7.3 Cleaning and disinfecting .........................................................................................................23
7.4 Casing ......................................................................................................................................23
7.5 Coil and drain tray ....................................................................................................................23
7.6 Side panels opening.................................................................................................................24
7.7 Drain tray opening....................................................................................................................24
7.8 Electric defrost elements replacement .....................................................................................25
7.9 Fans .........................................................................................................................................27
7.10 Fan replacement ......................................................................................................................27
7.11 Fan shroud heater....................................................................................................................27
7.12 Air streamer..............................................................................................................................28
7.13 Shut-up sock ............................................................................................................................28
31671288EN-02
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Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
8 Residual risks.........................................................................................................................29
9 Troubleshooting .....................................................................................................................30
10 Spare parts..............................................................................................................................31
31671288EN-02
4
Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
1 Important information
1.1 Disclaimer
This Instruction Manual applies to all Optigo F45CC and F50CC cubic light industrial air cooler
products. Manual must be carefully examined and instructions should be followed up at all times.
Alfa LU-VE does not accept liability for any damage resulting from failure to comply with or
incomplete compliance with the instructions as given in the manuals and order-related documents.
As the heat exchanger is supplied indirectly, the producer is not acquainted with its actual
application.
1.2 Safety precautions
Do not modify the unit by removing any of the safety guards or by-passing any of the safety
devices. All work on the equipment must be carried out by trained personnel.
For handling, installing and maintenance operations it is essential to comply as follows:
• Employ authorized personnel only.
• Wear protective gloves.
• Overhead loads: never stand or walk below the loads.
All on-site electrical connection are the responsibility of the installer. For electrical wiring operations
it is essential to comply as follows:
• Employ authorized personnel only.
• Make sure the power line circuit is open.
• Installation of a main switch is mandatory and is the responsibility of the installer.
• The main switch on the general power panel is open and padlocked.
• The electrical supply is suitable for the equipment supplied.
For header/distributor connection operations it is essential to comply as follows:
• Employ authorized personnel only.
• Make sure the supply circuit is open (no pressure).
• When performing welding operations make sure the flame is not directed towards the equipment
(insert a shield If required).
Hydraulic circuit shall comply as follows:
• Refrigerant, temperature and pressure must agree with the data on the product label of the
relevant heat exchanger.
• The supplied heat exchanger is optimized for the refrigerants as stated in the data sheet or
order documents. Please contact Alfa LU-VE before using any other refrigerants. The allowed
maximum pressure (design pressure PS) is noted on the type plate. During production the heat
exchanger was subjected to a strength test exceeding the design pressure PS. However, during
normal use the design pressure PS may not be exceeded.
• Heat exchangers supplied by Alfa LU-VE are normally not equipped with a high-pressure cut
out. The installer is responsible for fitting a high-pressure cut out on the system in which the
heat exchanger is used.
• The heat exchanger shall not be blocked in. If the ambient temperature rises, the pressure could
rise and exceed the design pressure.
1.3 Intended use
Air coolers are partly completed machinery according to Machine Directive 2006/42/EC (EU
market) - The Supply of Machinery (Safety) Regulations 2008 (UK market) and are intended for
incorporation in cooling systems. Declarations of Incorporation are available on alfa.luvegroup.com.
31671288EN-02
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Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
The product is built according to the following standards and directives:
EU market UK market
2014/68/EU Pressure Equipment Directive (PED) Pressure Equipment (Safety) Regulations 2016 (PER)
EN 60204-1 Safety of Machinery - Electrical equipment of machines The Electrical Equipment (Safety) Regulations 2016
2014/30/EU Electromagnetic Compatibility Directive Electromagnetic Compatibility Regulations 2016
2014/35/EU Low Voltage Directive The Electrical Equipment (Safety) Regulations 2016
Any applicable local or national legislation
However it is forbidden to operate our equipment before the machine incorporating the products or
making part thereof has been declared to be in conformity with the EC Machine Directive. The heat
exchanger shall be installed in conformance with the recognized national standards of electrical and
refrigeration installation practice. It is not permitted to use the heat exchanger for any purpose other
than the one it was designed for by Alfa LU-VE.
1.4 Where to find product information
Detailed technical data for individual product models are available in order related documents,
on the product label and in product data sheets. Comprehensive technical information for all Alfa
LU-VE air heat exchanger products is available on-line on alfa.luvegroup.com. This includes:
• Product manuals
• Instruction manuals
• Product leaflets & brochures
• Product data sheets (selection software)
• Dimensional drawings
• Electrical wiring diagrams
• Certificates
Alfa LU-VE offers world-wide service and support. In case of any questions
or uncertainty please contact your local Alfa LU-VE representative.
Contact addresses are available at alfa.luvegroup.com.
1.5 Warning symbols
The following warning symbols are used in Alfa LU-VE instruction manuals.
General warning.
Risk of malfunctioning and/or
damage.
Hot surfaces. Danger of burns.
Wear adequate protection.
Moving parts. Danger of injuries.
Do not operate without protection guard mounted.
Sharp surface. Danger of cutting injuries. Wear
adequate protection.
Overhead load.
Never stand or walk below the load.
Mandatory prescription.
Follow instructions as provided.
Forklift trucks or other logistic vehicles.
Stay clear of working space.
Risk of injuries.
Wear head protection.
Electrically powered component. Switch off power
supply before any maintenance or installation
activity.
Risk of injuries.
Wear safety footwear.
Cold parts. Danger of frostbite injuries.
Wear adequate protection.
Risk of injuries.
Wear protective gloves.
Danger of crushing.
Wear adequate protection.
Manuals must be carefully examined and
instructions should be followed up at all times.
Optigo F45CC - F50CC
31671288EN-02
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Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
1.6 Health and hygiene
If the equipment is used in the food industry, responsibility with regard to hygienic conditions lies
with the end user.
1.7 Checks at delivery
At the moment of delivery, carefully check the units.
All finned coils are pressure tested with dry air, sealed and supplied with a slight overpressure. Prior
to installation, the leak resistance must be checked with the schrader valve.
Any present damage must be reported on the delivery note with a description of the damage.
Damaged heat exchangers, including when the damage is not externally visible, are to be reported
to the shipping agent and Alfa LU-VE within 24 hours.
1.8 Return of unused heat exchangers
Air heat exchangers that have been delivered in accordance with orders are in principle not
returnable. Heat exchangers can only be returned under certain conditions and following
consultation with Alfa LU-VE. This applies exclusively to unused units. The heat exchangers that
are to be returned should be delivered carriage paid to Alfa LU-VE in the original, undamaged and
unwritten factory packaging. Not returnable are:
• Heat exchangers older than three months from the invoice date.
• Heat exchangers that have already been built in and/or are damaged.
1.9 Guarantee
For our guarantee conditions, we refer to the Terms of Delivery. In general, the warranty period
between Alfa LU-VE and the customer is 24 months from factory invoice date or 12 months of
operation, which ever comes first. Heat exchangers must not be returned or disposed of, other
than in accordance with instructions from Alfa LU-VE. Contact your local Alfa LU-VE representative
before any remedial action is taken on the units, otherwise warranty may be void.
1.10 Disposal
After decommissioning the heat exchanger coil should be emptied from refrigerant fluids. Avoid
any emissions in the environment. Any refrigerants and oil residuals must be properly disposed of
according to applicable environmental regulations. The fully emptied heat exchanger unit, including
all electrical components, should be handed in to the proper authorized companies for recycling.
Alfa LU-VE products are made of:
• Plastic materials: polyethylene, ABS, rubber.
• Metallic materials: iron, stainless steel, copper, aluminium (possibly treated).
31671288EN-02
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Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
2 Product description
2.1 General information and application
Optigo FCC are cubic light industrial air coolers for general application in small to medium-sized
cooling, freezing and working rooms. Optigo FCC models are especially suitable for refrigerated
working, processing and storage rooms.
• Available in 2 fan diameters:
F45CC: Ø 450 mm
F50CC: Ø 500 mm
• Capacity range (SC2 with R404A): 5.4 up to 60.4 kW
• Air flow range: 4,600 up to 32,400 m³/h
• Min. room temperature: -35 °C
Refrigerant Design pressure
HFC* 24 bar
CO45-60 bar
Brine 10 bar
* Fluid group 2 according to EN 378
2.2 Standard configuration
• High-efficiency coil manufactured from internally grooved Cu tubes and louvered aluminium fins.
• Standard fin spacings: 4.5, 6.0, 7.5 and 10.0 mm.
• Optigo FCC coolers are available with 1 to 4 fans fitted with high efficiency AC or EC fan motors,
available in two fan diameters (450 and 500 mm) drawing through the coil.
• Durable galvanized steel casing, powder coated RAL 9003.
• Dismountable and openable casing for cleaning and inspecting purposes. Fitted with hinged
drain tray.
• Each heat exchanger is leak tested with dry air and finally supplied with a dry air pre-charge.
Fitted with schräder valve on the suction connection for testing purposes (only for HFC and CO
units).
• Delivered in mounting position on a wooden pallet covered with a wooden crate.
2.3 Options
•
• Electric defrost (E). The stainless steel defrost elements (both in coil and in drain tray) are
connected to dedicated connection box.
• Hot-gas defrost (G) - in coil, electrical defrost in drain tray
• Fan shroud heater
• EC fans (0-10 V) + Modbus
• Fan motors wired to a central connection box
• Fan switches
• Insulated drain tray
• Shut-up sock
• Textile tube adapter
• Air streamer
• Top connections - for brine models
31671288EN-02
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Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
Manufacturedby
SEST-LUVE-POLSKAsp.z.o.o.
ul.Wyczólkowskiego30,
44-109Gliwice,Poland
HEATEXCHANGER
FMS
CODE:
S/N:
PEDCATART4.3
Fluid:
VOLUME:
Ts:
MaxPres:
VENTILATION
Nr.Motors:
Power:
N°
N°
MADEIN
POLAND
DEFROSTING
Manufacturedby
SEST-LUVE-POLSKAsp.z.o.o.
ul.Wyczólkowskiego30,
44-109Gliwice,Poland
HEATEXCHANGER
F35MCEA-22-7NALBP-
CODE:10232606
S/N:7487840/2021
PEDCATART4.3
Fluid:FLUIDGROUP2
VOLUME:6.00
dm3
Ts:
-40 °C +55 °C
MaxPres:2.4MPa
VENTILATION
Nr.Motors:2
PowerS:230V50 Hz
180W0.8A
N°
N°
MADEIN
POLAND
DEFROSTING
EXAMPLE
2.4 Code description
F45CC * 1100 N 4 * *
1 2 3 4 5 6 7
1 Optigo cubic light industrial air coolers (F45CC=Ø 450 mm, F50CC=Ø 500 mm)
2 Application (blank=direct expansion, W=brine)
3 Model type
4 Defrost system (N=air defrost, E=electric defrost, G=hot-gas defrost)
5 Fin spacing (4=4.5, 6=6.0, 7=7.5, 10=10.0 mm)
6 Circuits code - only for brine units
7 Options
3 Product labels
Manufactured by
AIR HEX ALONTE S.R.L.
via delle Albere 5, 36045, Alonte(VI)
HEAT EXCHANGER
F45CC1100N4
Code:
Optigo
Manuf. Date: Net Weight ±5%:
*** **** Kg
PED CAT ART 4.3
Max DN: Fluid Group:
***
2
PS min/max: PT:
*** bar *** bar
TS min/max: Test Date:
*** °C ***
ELECTRICAL DATA
Fan motors qty: 2
Power Supply: 400V/T/50
8166445
Cust. Code:
MADE IN ITALY
EXAMPLE
EXAMPLE
1. Product label
Model Refer to paragraph "2.4
Code description"
Product code
Product serial nr.
Communicate this when
ordering spare parts as
they identify the unit
Unit Net Weight Check before any lifting
operation to ensure that
proper lifting tools are used
PED Category According to PED
Max DN Maximum diameter of the
distributor tube
Fluid Refrigerant
Ps Design pressure
Pt Test pressure
Coil Ts Range of operating
temperatures for the coil
Test date Date on which the coil has
been pressure tested in the
factory
No. Motors Number of fans
Product code
Fluid
No. Motors
PED category
Model
Pt
Test date
Weight
Ts
Ps
Max DN
Product
Serial nr.
31671288EN-02
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Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
2. Product label - coil
Product code
Product serial nr.
Communicate these when
ordering spare parts as
they identify the unit
PED Category According to PED
Max DN Maximum diameter of the
distributor tube
Fluid Refrigerant
Ps Design pressure
Pt Test pressure
Coil Ts Range of operating
temperatures for the coil
Test date Date on which the coil has
been pressure tested in the
factory
Manufactured by
AIR HEX ALONTE S.R.L.
via delle Albere 5, 36045, Alonte(VI)
HEAT EXCHANGER
Coil Code:
**********
Manuf. Date:
***
PED CAT ART 4.3
Max DN: Fluid Group:
***
2
PS min/max: PT:
*** bar *** bar
TS min/max: Test Date:
*** °C ***
SN: 8166445
Product Code:
Optigo
F45CC1100N4
MADE IN ITALY
EXAMPLE
EXAMPLE
Fluid
Product
Serial nr.
PED category
Pt
Test date
Product code
Coil code
Ts
Ps
Max DN
3. Precharge warning
Only for HFC and COunits.
Units are delivered from the manufacturer
with an overpressure. Check pressure on the
Schrader valve. With unpressurised unit:
immediate report to manufacturer and note on
bill of delivery.
4. Overload protected motors warning
Cut out power supply before any maintenance or
installation activity.
31671288EN-02
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Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
4 Transport and storage
During transportation the heat exchanger must be handled with all required care. Any instruction or
warning signs attached to the heat exchanger or the packaging must be followed. Avoid shocks or
continuous vibrations during transport. These may cause damage to the product. If required, consult
Alfa LU-VE and disassemble during transport any parts that are likely to be set into vibration. Air
heat exchangers must be adequately fixed on the transport vehicle. If temporary storage of the heat
exchanger is required, the following points should be observed:
• Store the heat exchanger in its packing, in a dry place with sufficient protection against sun and
other environmental influences.
• Always place air heat exchangers on an even surface.
• Do not stack air heat exchangers unless explicitly indicated this is allowed.
• Storage temperature between -40° C and +50 °C.
• Never open or remove the schrader valves. Overpressure in the coil must be maintained.
Shelf life of air coolers is one year. If longer storage periods occur, check:
• Proper functioning of the fan motor.
• Mounting brackets, lifting lugs and fan fixings for corrosion.
5 Unpacking and lifting
Optigo FCC models are delivered in mounting position on a wooden pallet covered with a wooden
crate. Handling and positioning can take place with use of a forklift.
>50 mm
Packed air coolers may be stacked during
transportation and storage. Respect the
maximum number of stacked air cooler units.
In order to avoid damage to the air cooler or
falling of the unit, ensure that the lifting forks
cover all beams from the lower support pallet.
F45CC
max. 3
F50CC
max. 2
31671288EN-02
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Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
Lift the unit into mounting position.
Ensure that the cooler is not lifted directly onto
the drain tray or the finned coil. Utilizing the
proper wooden transport beams and/or pallets
prevents the cooler bending at the extremes
such that the cooling circuit or other components
are damaged. All lifting procedures must be
carefully carried out by properly qualified
personnel, ensuring absolute safety at all times.
Secure the unit following instructions given in
chapter "6 Installation".
Once the unit is secured in the installation
position, loosen the fixing materials from the
lower support pallet, remove the remaining
packaging materials and lower the forks.
Place the unit on the ground.
Loosen the fixing materials from the top crate.
Remove top crate.
Insert the forks under the lower pallet.
31671288EN-02
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Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
6 Installation
6.1 Mounting dimensions
Dimensional drawings
Optigo F45CC-F50CC
1 1/4'' GAS
30x20
L
H
W
A
525
B C
IN
OUT
Model n. of fans
Dimensions (mm)
L A B C W H
F45CC **00
**02 1 1290 800 800 - 675 660
F45CC **06
**08 2 2090 1600 1600 - 675 660
F45CC **12
**14 3 2890 2400 2400 - 675 660
F45CC **18
**20 4 3690 3200 1600 1600 675 660
F50CC **00
**02 1 1290 800 800 - 730 880
F50CC **06
**08 2 2090 1600 1600 - 730 880
F50CC **12
**14 3 2890 2400 2400 - 730 880
F50CC **18
**20 4 3690 3200 1600 1600 730 880
Coolers must be hung such that the coolers can contract and expand
somewhat. Cooler contraction occurs during refrigeration operation, and
cooler expansion occurs during defrost. For air coolers with copper tubing
this figure runs up to 1.65 mm per meter cooler length. All heat exchangers
must be set up level.
Weight information are listed on the product label and/or in the relevant
product documentation.
Detailed drawings showing all required mounting and refrigerant connection
dimensions are available available for download on alfa.luvegroup.com.
31671288EN-02
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Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
6.2 Mounting bracket
Use suitable studs when mounting the unit to the
ceiling.
Fix the unit to cold room ceiling by securely
tightening nuts and washers.
6.3 Location and technical spaces
Heat exchangers should be positioned such that the following criteria are met:
• Adequate space must be left on the air inlet side of the heat exchanger. The air discharge side
should be free of restrictions. Recirculation of air is to be avoided.
• The heat exchangers should not be connected to ducting on either the air inlet side or discharge
side, unless the heat exchanger has been specifically designed for such an application.
• Adequate distance from heat sources.
• Adequate distance from sources of radio or electromagnetic emissions.
• Adequate space and illumination must be left for maintenance operations and personnel.
• Installation area free from oils, vapours and flammable gases.
• Installation surface shall support the weight of the unit and minimize vibration transmission.
• Weight information and dimensions are listed on the product label and/or in the relevant product
documentation.
• Do not obstruct passageways or doors.
• Coolers must be hung such that the coolers can contract and expand somewhat. Cooler
contraction occurs during refrigeration operation, and cooler expansion occurs during defrost.
For air coolers with copper tubing this figure runs up to 1.65 mm per meter cooler length. All
heat exchangers must be set up level.
• Hazards, position of controls and switch must be correctly signalled. Controls and switch must
be positioned so that they are easily accessible and manageable.
It is important to remember that the total amount of heat to be dissipated depends on receiving
the full design air volume at the design entry air temperature which allows this air to be freely
discharged after passing through the heat exchanger. Any restrictions may impair the performance
of the cooler. If in doubt, please check with Alfa LU-VE.
Ø min 10 mm
Ø max 18 mm
500 mm
Respect the minimum wall distance on suction
side.
31671288EN-02
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Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
min. A
A
E
Respect the minimum space for electric defrost
extraction and replacement.
6.4 Refrigerant connections
All pipework and connections must be made in accordance with good refrigeration design and
installation practice. Ensure that no stresses are transmitted to the pipework. All pipework should be
adequately attached to the walls/ceilings of the cold room and not only to the cooler itself. Pipework
must be adequately supported to prevent vibration or external load on the cooler headers, etc.
Do not adapt headers position to the suction line.
Ensure the supply circuit is closed (no pressure) before connecting the suction lines.
Ensure the flame nozzle is not aimed at the
equipment, when welding.
6.5 Using secondary refrigerants
In order to avoid crystallisation, and the consequent erosion of the circuit, the temperature of the
secondary refrigerants may never fall below the protection temperature of the relevant secondary
refrigerant. To avoid circuit erosion, the flow rate may not exceed the design value as indicated in
the product specification without prior permission from Alfa LU-VE. The secondary refrigerant used
must have protective agents against oxidation, corrosion, erosion, furring, rust, etc. and may not
contain any contaminants. Secondary refrigerants may only be used in a closed system.
When the system has been filled, it must be completely de-aerated. Deaeration of a secondary
circuit is of major importance in all instances since oxygen contributes towards corrosion, in the
worst scenarios leading to circuit leakage, and other problems and affects inhibitors. For correct
design, de-aeration and operation always follow instructions given in the secondary refrigerant
manufacturer manual. Particular attention is required when using potassium formiate based heat
transfer fluids: the piping system and venting/draining valves of the heat transfer section must be
adapted for the heat transfer fluid in question.
31671288EN-02
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Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
6.6 Pressure test
Ts'=cold room air inlet temperature.
Te=evaporating temperature. It is related to the
refrigerant pressure on the unit cooler outlet.
Trs=refrigerant superheat temperature, on
suction line near thermostatic valve bulb.
(Trs-Te)=superheat
Keep the superheat as low as possible to obtain
maximum unit cooler performance.
The thermostatic valve fitted must be correctly
sized for the installation conditions and adjusted
for correct system operation.
6.7 Drain line
Check all drain lines and drain trays to ensure that no improper material such as, e.g., packaging
material blocks the drain.
All pipework should be adequately attached to
the walls/ceilings of the cold room and not only
to the cooler itself.
The drain line diameter must be at least the
size of the drain tray drain diameter and should
be laid with an adequate slope. For room
temperatures below 0° C drain line insulation
and an internal or external heating element are
required to prevent freezing. A syphon must be
installed on the drain line, outside the cold room.
Tighten drain connection by hand only.
31671288EN-02
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Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
6.9 Electrical connections
All electrical connections must be made in accordance with the locally valid regulations and in
conformance with good installation practice. The site supply voltage, frequency, accepted power
rating and number of phases must comply with the details on the technical documentation. All
electrical supply lines must be connected to the terminal boxes through suitable waterproof glands
using bottom entry or, in case of horizontal installation, the cable is routed to form a water trap. Be
sure to provide grounding incorrect grounding can cause eletric shock.
If the heat exchangers are installed and there is to be an appreciable delay in putting the plant into
operation, a temporary electrical supply should be connected to each motor, sufficient to run for
at least 4 hours. This procedure should be carried out at least once every 4 weeks, until the heat
exchanger is fully operational. It is up to the end user to verify the conditions for protection by
automatic disconnection of supply, according to applicable standards. Heat exchangers are
designed for TN power systems. The insulation fault protection must be part of power supply of the
heat exchanger and is not supplied by the manufacturer.
The following data determine which connection diagram is to be selected and respected for
electrical installation:
• Heat exchanger model indication
• Fan motor type
• Electrical options
When in doubt always contact your local supplier or Alfa LU-VE representative for assistance.
Ensure complete electrical isolation before performing any wiring.
heaters
In accordance with the current legislation,
install a single pole terminal in a visible position
between the unit and the power supply. Opening
between terminals 3 mm at min.
Connect terminals by following the wiring
diagrams on the cover.
For systems using electrical/hot-gas defrost, a
defrost termination thermostat should be used,
having a range of 10 °C to 20 °C with a sensor
attached to the top return bends of the coil block
or buried in the top of the coil block fins.
6.10 Power failure
In order to avoid damage to the compressor, the refrigerant supply must be closed in the event of
power failure, e.g. by closing the magnetic valve. Safety measures elsewhere in the system will
prevent the pressure in the heat exchanger from exceeding the design pressure.
6.8 Hot-gas connections
USCITA
OUTLET
SORTIE
AUSTRITT
SALIDA
ВЫХОД
NO - NO - NEI -
NEJ - NEJ
NO - NO - NEI -
NEJ - NEJ
NO - NO - NEI -
NEJ - NEJ
SI - YES -
OUI - JA - SI
-ДА
SI - YES -
OUI - JA - SI
-ДА
SI - YES -
OUI - JA - SI
-ДА
31671288EN-02
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Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
6.11 Fan motor connections
The maximum load of the motors and the recommended settings for the overload relays are to be
respected. The built-in thermal overload protection must be integrated in the control circuit when
a connection in the terminal box is present. The electrical control circuit should be arranged with
a manual reset device in order to prevent continuous on/off switching (tripping) of the motors.
Suppliers and manufacturers of electrical motors provide no guarantee for motors that are
combusted through overload.
Ensure complete electrical isolation before performing any wiring.
F45CC AC fan motors
1 ~ 230 V 50-60 Hz
A
Giallo/Verde
Yellow/Green
Jaune/Vente
Grün/Gelb
Amarillo/Verde
Зеленый/
Opahжелтый
B
Marrone
Brown
Marron
Braun
Marrón
Коричневый
C
Azzurro
Light Blue
Bleu
Blau
Azul
Синий
D
Rosso
Red
Rouge
Rot
Rojo
Красный
E
Grigio
Grey
Gris
Grau
Gris
Серый
Model Type Power supply ØNominal power (x1) Nominal current (x1)
mm W A
F45CC AC 1~230 V - 50 Hz 450 480 2.1
F45CC AC 1~230 V - 60 Hz 450 665 2.9
31671288EN-02
18
Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
F50CC AC fan motors
Model Type Power supply ØNominal power (x1) Nominal current (x1)
mm W A
F50CC AC 500 840 1.45
F50CC AC 3~400 V - 50 Hz Y 500 540 0.96
F50CC AC 500 1200 2.0
F50CC AC 3~460 V - 60 Hz Y 500 700 1.05
Alta velocità a collegamento
High speed - connection
Grande vitesse - couplage
Höhe Drehzahl - Schaltung
Alta velocidad conexión
ысокая скорость подключения
L1 L2 L3 PE
TK TK W2 U1 U2 V1 V2 W2
3 ~ 400 V 50 Hz
Bassa velocità a collegamento
Low speed - connection
Petite vitesse - couplage
Biedere Drehzahl - Schaltung
Baja velocidad conexión
Hизкая скорость подключения
TK TK W2 U1 U2 V1 V2 W2
L1 L2 L3 PE
3 ~ 400 V 50 Hz
A
Giallo/Verde
Yellow/Green
Jaune/Vente
Grün/Gelb
Amarillo/Verde
Зеленый/
Opahжелтый
B
Arancio
Orange
Orange
Orange
Naranja
Оранжевый
C
Rosso
Red
Rouge
Rot
Rojo
Красный
D
Grigio
Grey
Gris
Grau
Gris
Серый
E
Marrone
Brown
Marron
Braun
Marrón
Коричневый
F
Azzurro
Light Blue
Bleu
Blau
Azul
Синий
Fan thermal protection
The fan thermal protection TK is connected to the fan power counter fitted to the system to ensure
the correct functioning of the fan, which increases its power draw especially at low temperature and
when heavily frosted. TK protection is recommended instead of circuit breakers as it allows the fans
to increase their power draw, guaranteeing reliable operation over time.
●Specifiche tecniche contatto TK
Imax = 3 A resistivi (cosΦ=1)
Vmax = 250 V
●TK contact technical specifications
Imax = 3 A resistive (cosΦ = 1)
Vmax = 250 V
Example of fan thermal protection
This connection scheme is not intended to
be exhaustive. Always provide a differential
magnetothermal protection in accordance with
local regulations.
31671288EN-02
19
Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
F45CC EC fan motors
Model Type Power supply ØNominal power (x1) Nominal current (x1)
mm W A
F45CC EC 1~230 V - 50/60 Hz 450 410 1.8
F50CC EC fan motors
Model Type Power supply ØNominal power (x1) Nominal current (x1)
mm W A
F50CC EC 3~400 V - 50/60 Hz 500 1000 1.6
PE PE L NC
COMGNDRSB
0-10V RSA +10VN
31671288EN-02
20
Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
6.12 Defrost
Always refer to the electrical scheme for both connections and nominal voltage of the electrical
defrost option. Earth cable must always be wired and connected to the appropriate terminal in
the connection box. Always refer to the electrical scheme order to identify the ground terminal.
Installation of a switch for defrost line is mandatory and is the responsability of the installer.
Warning about the neutral wire: it must be connected if indicated in the electrical scheme. It must
not be connected if it is not shown in the electrical scheme.
Coolers without defrosting facilities may not be used in room temperatures below +2 °C.
If the cooler is working on a time termination cycle, it is suggested that an initial defrost period be
set at 35 to 45 minutes (in combination with the number of defrost periods). This setting is to be
refined through trial and error, according to the actual defrost requirements depending on cooler
model, size, and working conditions. If the defrosting cycle is terminated via a temperature sensor,
close attention must be taken in positioning the thermostat sensor. The temperature sensor is
usually set at a value between 10°C and 15°C. In general it should be positioned where the last
traces of frost disappear, usually on the coil.
At room temperatures of around 0°C the last frost is usually in the top of the coil block. At room
temperatures below -20°C, this is the consequence of the so-called 'chimney effect', usually in the
lower half of the coil block at approx. ¼ of the fin height. Unfortunately a number of factors (cooler
position relative to an access door or stored products, precise setting of the thermostatic expansion
valve, etc.) may cause identical coolers to perform differently. Thermostat sensors should NOT be
placed in the direct vicinity of a heater element. The final position of the temperature sensors must
be determined through trial and error.
6.13 Electric defrost connections
Ensure complete electrical isolation before performing any wiring.
The following electrical connection diagrams for electrical defrost
connection is shown as examples. For additional details, please refer to
the connection diagrams available for download on alfa.luvegroup.com.
Electrical connections
Optigo F45CC-F50CC
RCL1
RCL1
RCL2
RCL2
RCL3
RCL3
FCL1
FCL1
FCL2
FCL2
FCL3 FCL3
EXAMPLE
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